<body>
<script>
//数组转字符串
var a = [1, 2, 3, 4, 5]; //数组
var b = a.join(",");
console.log(b) //字符串
//字符串转数组
var c = "1,2,3,4,5";
var d = c.split(",");
console.log(d)//数组
</script>
</body>
